Abstract

Aligned nanotubes filled with particles were synthesized through a single pyrolysis reaction of acetonitrile and catalyst at 900 °C under flow. The number and spacing of the encapsulated particles inside the nanotubes were controlled by adjusting the amount and time of acetonitrile feeding. The chemical composition and atomic structure of the nanocapsulates were investigated using combined techniques of high-resolution electron microscopy,electron energy loss spectroscopy(EELS), and elemental mapping. It was found that the encapsulated particles were particles and that the doped nitrogen atoms, which were mainly pyridine-like, bonded with two carbon atoms within the graphene sheets, giving rise to a -type peak at around 399 eV in EELS spectra.